I have to omit I have not been a Mobil 1 fan. But, after reading up on this extended version oil (from this website) I decided to buy 3 jugs awhile back. I was going to use this oil after my Castrol Edge/Magnetic supply was depleted. Well...in went this oil into my daughter's 2007 Rav 4 V6 (187k mi.) just 3 days ago. I have to say w/o a doubt the engine is way smoother. Noticeable difference that even my daughter noticed. The "extended" drain will probably be 1 yr. in duration w/around 7k miles. When Mobil offers a rebate, I will take advantage. BTW....Napa has the oil on "sale" for $28.98 and you'll receive a free hat and Mobil has a mail in offer for a free backpack. (While supplies last.) Very impressive oil. I have quite a lot of Pennzoil Ultra Platinum for the Nissan. I would really be curious how the Mobil 1 EP compares w/the PUP. (As well as Ravenol DXG.)